Release a restricted user

Question

Hello

Please i need your help on this issue.

One of my user is seeing her account is restricted but not showing up in the restricted users page.

The account has been restricted from Sending emails.

The user was sending volumes of emails over 100 emails over an hour.

Emails connected to this domain are not able to send any emails.

Answer 1

Hi Rita,

Thank you for posting your question in the Microsoft Q&A forum!

In general, there are recipient rate limit (10,000 recipients per day) and message rate limit (30 messages per minute) for Exchange Online mailbox. Does the problematic mailbox receive any NDR message that mentioned what kind of limitation this mailbox reached?

You can check this article for more details about O365 sending limits:

Sending limits

Also, if this specific user account is used for some third-party application and bulk-mailing scenarios, option 2 (SMTP relay) and 3 (Direct Send) is recommended instead in the following article:

How to set up a multifunction device or application to send email using Microsoft 365 or Office 365 | Microsoft Learn

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